Dr. Seuss got the idea for his first work, "And to Think That I Saw It on Mulberry Street", from listening to the rhythmic sound of a ship’s engine.
The author mentioned his book was reportedly rejected by more than 20 publishers before it was finally accepted for publication by Vanguard Press in 1937.
His books have gone on to sell over half a billion copies worldwide, making him one of the biggest-selling children’s authors in the world.
